AZ Mom
I have the Ford OEM Factory Invision DVD Headrest System ($2000) in my 14 Sport, its been transferred from my 11 Limited, to my 13 Limited, to my 14 Sport. Sometimes available on Ebay for $1500-$2000
Works great, covered by OEM warranty and has had one headrest replaced for broken screen tab that holds screen locked and another for no audio. Two audio IR headsets, two IR remotes, two DVD players so each screen can show its own movie or watch the same as each other. Be clear nothing pushes video or audio up front to the MFT system everything is controlled at the headrest or by remote control.
After researching other aftermarket systems & cost I put a set of Audiovox Advent headrest DVD systems ($1200) in my wife's 13 Acadia Denali and I must say that Advent system is superior to the Ford Invision Lt Series OEM style. Superior in fit and finish, screen quality, sound, features, and ability to accept various media formats.
When I asked Invision Customer Support about the ability of their OEM headrests to accept newer technologies they simply said "NO". I asked them about the USB port on the headrests and the ability of the Invision system to update the monitors firmware to allow for playing movies off a USB drive and they said "NO"
When I asked Audiovox they said they were looking at a possible firmware update.
Lets be honest DVD media format is a dying form factor.
Mpeg 4 movies can be stored on a USB drive and should be able to played on all these monitors.
If I had known about Audiovox Advent system before I would not have taken the Ford OEM Invision LT Series system, I would have installed the Advent system.
http://www.youtube.com/watch?v=zthfXkDCJF8
If you already have iPads at home consider the iPad mounting system with charging and Bluetooth audio included & way cheaper.
I got the Advent system at:
http://autospatech.com/mobile-video/headrest-video.html
The headrests they use are IDENTICAL OEM matches in fabric and color to the Ford non DVD factory headrests.
To be clear you cannot control anything from these systems by using MFT.